Warp wrote:
>   The emergency gesture underwater must be one of the most confusing ever:
> It's the "thumbs up" gesture.

That's not exactly "emergency", but rather just "go more shallow". Doesn't 
even mean "go to the surface." (Depending on the emergency (out of air, too 
cold, lost weights, etc) you have different signs.)

Thumbs up with your other palm flat on top means "Stop going up here" for 
example. As in, "we need to stop here to decompress" rather than just "level 
off for a while, there's something I want to see."

But I'll agree that even after dozens of dives I still sometimes used 
thumbs-up to mean OK.  And I can perfectly understand safety people taking a 
thumbs-up to mean "I need help getting to the surface."

-- 
   Darren New, San Diego CA, USA (PST)
   I ordered stamps from Zazzle that read "Place Stamp Here".

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